What is the chemical formula for marble?

Which statement correctly compares the sun and planets? A. Planets have an atmosphere; the sun does not. B. Planets gives off en

likoan [24]

Answer:

c

Explanation:

because the sun is at the center of the universe the planet orbit the sun its basically a simple answer so if you need more help im right here

8 0

3 years ago

Substances that contain a transition metal can be oxidizing. The greater the number of oxidation of this metal, the greater the

Ne4ueva [31]

B I think that it but I don’t know

7 0

3 years ago

20.1 g of aluminum and 219 g of chlorine gas react until all of the aluminum metal has been converted to AlCl3. The balanced equ

Romashka-Z-Leto [24]

Answer:

The amount of Cl2 gas left , after the reaction goes to completion is : 139.655 grams

Explanation:

Molar mass : It is the mass in grams present in one mole of the substance.

Moles of the substance is calculated by:

$Moles=\frac{Mass}{Molar\ mass}$

$2Al(s)+3Cl_{2}(g)\leftarrow 2AlCl_{3}(g)$

According to this equation:

2 mole of Al = 3 mole of Cl2 = 2 mole of AlCl3

Molar mass of Al = 27.0 g/mol

Mass of Al = 20.1 gram

Moles of Al present in the reaction :

$Moles=\frac{Mass}{Molar\ mass}$

$Moles=\frac{20.1}{26.98}$

Moles of Al = 0.744

Similarly calculate the moles of Cl2

Molar mass of Cl2 = 71.0 g/mol

Mass = 219 gram

$Moles=\frac{Mass}{Molar\ mass}$

$Moles=\frac{219}{70.98}$

Moles of Cl2 = 3.08 moles

According to equation,

2 mole of Al reacts with = 3 mole of Cl2

1 moles of Al reacts with = 3/2 mole of Cl2

0.744 moles of Al reacts with = 3/2(0.744) moles of Cl2

= 1.116 moles of Cl2

But actually present Cl2 = 3.08 moles

Hence Al is the limiting reagent , and Cl2 is the excess reagent.

The whole Aluminium Al get consumed during the reaction.

The amount of Cl2 in excess = Total Cl2 - Cl2 consumed

Cl2 in excess = 3.08 - 1.116 = 1.964 moles

Cl2 in grams = 1.964 x 70.90 = 139.655 grams

6 0

4 years ago

The real purpose of the Milgram study was to investigate 1. the effects of punishment. 2. memory and learning. 3. the effect of

miskamm [114]

Answer:

1. the effects of punishment.

Explanation:

Stanley Milgram (1933 - 1984) was a graduate American psychologist at Yale University who conducted the Little Worlds Experience (the source of the concept of the six degrees of separation) and the Milgram Experience on obedience to authority.

Milgram was interested in researching how far people would go in obeying an instruction if it involved harming another person.

The study aimed to observe how easily ordinary people could be influenced into committing atrocities.

5 0

3 years ago

Ask Your Teacher You are given two clear, colorless aqueous solutions. You are told that one solution contains an ionic compound

Slav-nsk [51]

Answer:

Explanation:

Ionic compound are compounds formed by one atom losing an electron while the other gains electron as such the solution always contain charge ions compared to covalent solution which is predominantly formed by two atoms sharing electron. The two solution should be connected to a circuit with a bulb in turns with the same circuit, the solution that turns the bulb on is the ionic solution. This is because their charged ions conducts electricity when voltage is passed through it while the covalent solution does not conduct electricity.

4 0

3 years ago